<template>
  <view :class="[styleType === 'text' ? 'segmented-control--text' : 'segmented-control--button']" :style="{ borderColor: styleType === 'text' ? '' : activeColor }" class="segmented-control">
    <view v-for="(item, index) in values" :class="[styleType === 'text' ? '' : 'segmented-control__item--button', index === currentIndex && styleType === 'button' ? 'segmented-control__item--button--active' : '', index === 0 && styleType === 'button' ? 'segmented-control__item--button--first' : '', index === values.length - 1 && styleType === 'button' ? 'segmented-control__item--button--last' : '']" :key="index" :style="{ backgroundColor: index === currentIndex && styleType === 'button' ? activeColor : '', borderColor: (index === currentIndex && styleType === 'text') || styleType === 'button' ? activeColor : 'transparent' }" class="segmented-control__item" @click="_onClick(index)">
      <view>
        <text :style="{ color: index === currentIndex ? (styleType === 'text' ? activeColor : '#fff') : styleType === 'text' ? '#000' : activeColor }" class="segmented-control__text" :class="styleType === 'text' && index === currentIndex ? 'segmented-control__item--text' : ''">{{ item }}</text>
      </view>
    </view>
  </view>
</template>

<script lang="ts">
/**
 * SegmentedControl 分段器
 * @description 用作不同视图的显示
 * @tutorial https://ext.dcloud.net.cn/plugin?id=54
 * @property {Number} current 当前选中的tab索引值，从0计数
 * @property {String} styleType = [button|text] 分段器样式类型
 * 	@value button 按钮类型
 * 	@value text 文字类型
 * @property {String} activeColor 选中的标签背景色与边框颜色
 * @property {Array} values 选项数组
 * @event {Function} clickItem 组件触发点击事件时触发，e={currentIndex}
 */

export default {
  name: "UniSegmentedControl",
  emits: ["clickItem"],
  props: {
    current: {
      type: Number,
      default: 0,
    },
    values: {
      type: Array,
      default() {
        return [];
      },
    },
    activeColor: {
      type: String,
      default: "#2979FF",
    },
    styleType: {
      type: String,
      default: "button",
    },
  },
  data() {
    return {
      currentIndex: 0,
    };
  },
  watch: {
    current(val) {
      if (val !== this.currentIndex) {
        this.currentIndex = val;
      }
    },
  },
  created() {
    this.currentIndex = this.current;
  },
  methods: {
    _onClick(index) {
      if (this.currentIndex !== index) {
        this.currentIndex = index;
        this.$emit("clickItem", {
          currentIndex: index,
        });
      }
    },
  },
};
</script>

<style lang="scss" scoped>
.segmented-control {
  /* #ifndef APP-NVUE */
  display: flex;
  box-sizing: border-box;
  /* #endif */
  flex-direction: row;
  height: 36px;
  overflow: hidden;
  /* #ifdef H5 */
  cursor: pointer;
  /* #endif */
}

.segmented-control__item {
  /* #ifndef APP-NVUE */
  display: inline-flex;
  box-sizing: border-box;
  /* #endif */
  position: relative;
  flex: 1;
  justify-content: center;
  align-items: center;
}

.segmented-control__item--button {
  border-style: solid;
  border-top-width: 1px;
  border-bottom-width: 1px;
  border-right-width: 1px;
  border-left-width: 0;
}

.segmented-control__item--button--first {
  border-left-width: 1px;
  border-top-left-radius: 5px;
  border-bottom-left-radius: 5px;
}

.segmented-control__item--button--last {
  border-top-right-radius: 5px;
  border-bottom-right-radius: 5px;
}

.segmented-control__item--text {
  border-bottom-style: solid;
  border-bottom-width: 2px;
  padding: 6px 0;
}

.segmented-control__text {
  font-size: 14px;
  line-height: 20px;
  text-align: center;
}
</style>
